ext/pcntl: adding pcntl_getcpu.

ext/pcntl/config.m4

@@ -9,6 +9,25 @@ if test "$PHP_PCNTL" != "no"; then
   AC_CHECK_FUNCS([sigaction], [], [AC_MSG_ERROR([pcntl: sigaction() not supported by this platform])])
   AC_CHECK_FUNCS([getpriority setpriority wait3 wait4 sigwaitinfo sigtimedwait unshare rfork forkx pidfd_open sched_setaffinity])
 
+  dnl if unsupported, -1 means automatically ENOSYS in this context
+  AC_MSG_CHECKING([if sched_getcpu is supported])
+  AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <sched.h>
+int main(void) {
+  if (sched_getcpu() == -1) {
+      return 1;
+  }
+  return 0;
+}
+  ]])],[
+    AC_MSG_RESULT(yes)
+    AC_DEFINE([HAVE_SCHED_GETCPU],1,[Whether sched_getcpu is properly supported])
+  ],[
+    AC_MSG_RESULT(no)
+  ],[
+    AC_MSG_RESULT([no, cross-compiling])
+  ])
+
   AC_CHECK_TYPE([siginfo_t],[PCNTL_CFLAGS="-DHAVE_STRUCT_SIGINFO_T"],,[#include <signal.h>])
 
   PHP_NEW_EXTENSION(pcntl, pcntl.c php_signal.c, $ext_shared, cli, $PCNTL_CFLAGS -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)

ext/pcntl/pcntl.c

@@ -42,7 +42,7 @@
 #endif
 
 #include <errno.h>
-#if defined(HAVE_UNSHARE) || defined(HAVE_SCHED_SETAFFINITY)
+#if defined(HAVE_UNSHARE) || defined(HAVE_SCHED_SETAFFINITY) || defined(HAVE_SCHED_GETCPU)
 #include <sched.h>
 #if defined(__FreeBSD__)
 #include <sys/types.h>
@@ -1613,6 +1613,15 @@ PHP_FUNCTION(pcntl_setcpuaffinity)
 }
 #endif
 
+#if defined(HAVE_SCHED_GETCPU)
+PHP_FUNCTION(pcntl_getcpu)
+{
+	ZEND_PARSE_PARAMETERS_NONE();
+
+	RETURN_LONG(sched_getcpu());
+}
+#endif
+
 static void pcntl_interrupt_function(zend_execute_data *execute_data)
 {
 	pcntl_signal_dispatch();

ext/pcntl/pcntl.stub.php

@@ -999,3 +999,7 @@ function pcntl_setns(?int $process_id = null, int $nstype = CLONE_NEWNET): bool
 function pcntl_getcpuaffinity(?int $process_id = null): array|false {}
 function pcntl_setcpuaffinity(?int $process_id = null, array $cpu_ids = []): bool {}
 #endif
+
+#ifdef HAVE_SCHED_GETCPU
+function pcntl_getcpu(): int {}
+#endif

ext/pcntl/tests/pcntl_getcpu.phpt

@@ -0,0 +1,23 @@
+--TEST--
+pcntl_getcpu()
+--EXTENSIONS--
+pcntl
+--SKIPIF--
+<?php
+if (!function_exists("pcntl_getcpu")) die("skip pcntl_getcpu() is not available");
+if (!function_exists("pcntl_setcpuaffinity")) die("skip pcntl_setcpuaffinity() is not available");
+if (getenv('TRAVIS')) die('skip Currently fails on Travis');
+?>
+--FILE--
+<?php
+$pid = pcntl_fork();
+if ($pid == -1) {
+	die("fork failed");
+} else if ($pid == 0) {
+	var_dump(pcntl_setcpuaffinity(null, [1]));
+	var_dump(pcntl_getcpu());
+}
+?>
+--EXPECTF--
+bool(true)
+int(1)